Formula:
The fundamental principle for calculating the probability of a specific event is:
P(Event) = (Number of Favorable Outcomes) / (Total Number of Possible Outcomes)
For a standard 6-sided die, the total number of possible outcomes is 6 (rolling a 1, 2, 3, 4, 5, or 6).
Thus, the probability of rolling any specific number (e.g., a 4) on a single roll is 1/6.